Exchange 2013 RTM CU2 includes 965 cmdlets, but you’re not likely to use the vast majority of these simply because many are designed for one-time use. For example, after you configure a receive connector, you probably will not revisit the Set-ReceiveConnector cmdlet very often after the connector is working. However, you’ll use cmdlets such as Get-Mailbox daily. Some examples (in no particular order) of frequently used Exchange cmdlets are the following:
Get-ExchangeServer. Return a list of Exchange servers in the organization.
Disable-Mailbox. Disable a user’s mailbox.
Add-DistributionGroupMember. Add a new member to a distribution group.
Set-Mailbox. Set a property of a user’s mailbox.
Get-MailboxDatabase. Retrieve properties of a mailbox ...